Imports System
Imports System.Diagnostics
Imports Microsoft.VisualBasic

Class Module1

    Shared Sub Main()
        Console.WriteLine("Console.WriteLine is always displayed.")

        Dim myWriter As New TextWriterTraceListener(System.Console.Out)
        Debug.Listeners.Add(myWriter)

        Dim A As New Module1()
        A.Sub1()
    End Sub      'Main

    <Conditional("CONDITION1"), Conditional("CONDITION2")> _
    Public Sub Sub1()
        Sub2()
        Sub3()
    End Sub

    <Conditional("CONDITION1")> _
    Public Sub Sub2()
        Debug.WriteLine("CONDITION1 and DEBUG are defined")
    End Sub

    <Conditional("CONDITION2")> _
    Public Sub Sub3()
        Debug.WriteLine("CONDITION2 and DEBUG are defined")
        Trace.WriteLine("CONDITION2 and TRACE are defined")
    End Sub

End Class
' This console application produces the following output when compiled as shown.
'
'Console.WriteLine is always displayed.

'
'Console.WriteLine is always displayed.
'CONDITION1 and DEBUG are defined

'
'Console.WriteLine is always displayed.
'CONDITION1 and DEBUG are defined
'CONDITION2 and DEBUG are defined

using System;
using System.Diagnostics;

class Class1
{
    [STAThread]
    static void Main(string[] args)
    {                
        TextWriterTraceListener myWriter = 
            new TextWriterTraceListener(System.Console.Out);
        Debug.Listeners.Add(myWriter);
        Console.WriteLine("Console.WriteLine is always displayed");
        Method1();
        Method2();
    }
    
    [Conditional("CONDITION1")]
    public static void Method1()
    {
        Debug.Write("Method1 - DEBUG and CONDITION1 are specified\n");
        Trace.Write("Method1 - TRACE and CONDITION1 are specified\n");
    }
    
    [Conditional("CONDITION1"), Conditional("CONDITION2")]    
    public static void Method2()
    {
        Debug.Write("Method2 - DEBUG, CONDITION1 or CONDITION2 are specified\n");
    }
}

/*
This console application produces the following output when compiled as shown.

Console.WriteLine is always displayed
Method1 - DEBUG and CONDITION1 are specified
Method1 - TRACE and CONDITION1 are specified
Method2 - DEBUG, CONDITION1 or CONDITION2 are specified

Console.WriteLine is always displayed
Method2 - DEBUG, CONDITION1 or CONDITION2 are specified

Console.WriteLine is always displayed
Method1 - TRACE and CONDITION1 are specified

*/

/*
C++ with Managed Extensions uses the C++ standard preprocessor.  Use the 
preprocessor directives rather than this attribute.
*/